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FIVITCI-I H. BEACH, OF CHARLOTTE, MICHIGN.

- ROTARY SCREEN.

Lacasse.

Application 1ed March 30, 1918. Serial No. 225,813. Y

To all whom t may concern.'

Be it known that I, FITCH H. BEACH, a citizen of the United States, residing at Charlotte, in the county of Eaton and State of Michigan, have invented a new and useful Rotary Screen, of which the yfollowing is a specification.

This invention relates to rotary screens particularly designed for use as gravel screens, one of the objects of the invention being to provide a screen having simple and eilicient means whereby any material which might become lod'ged within the orifices in the screen will be knocked therefrom, thus maintaining the screen in a state of high eiciency at all times.

A further object is to provide a screen having a drum made up of hingedly mounted apertured plates adapted to shift during the rotation of the screen thus to dislodge any adhering material.

Another object is to provide a screen which is simple and durable in construction and Will not readily get out of order.

With the foregoing and other objects in View which will appear as the description proceeds, the invention consists of certain novel d'etails of construction and combinations of parts which will be hereinafter more fully described and pointed out in the claims, it being understood that various changes may be made within the scope of the appended claims without departing from the spirit of the invention.

ln the accompanying drawings the preferred' form of the invention has been shown.

In said drawings- Figure 1 is a side elevation of the screen.

Fig. 2 is a section on line 2 2, Fig. 1.

Referring to the figures by characters of reference, 1 designates a perforated drum mounted for rotation on or with a longitudinal shaft 2 and adapted to be supplied' at one end with material from a chute 3. This drum is designed to separate very coarse material from the finer gravel and sand. The drum is surrounded by a supplemental rotary screen which is of novel construction. This supplemental screen includes hoops 4 mounted for rotation Vand which are connected at regular intervals by parallel rods 5. A plate 6 is mounted to swing on each rod, sach plate being perforated to form a screen section and being provided along its Y VSpecioaton of Letters Patent.

which one of the rods ratentedaiine s, 1919.

outer or rearedge with a sleeve 7 through 5 extends. VThe plates are so proportioned and the rods 5 are so situated that, during a portion of the rota` tion of the screen, the free longitudinal ed'ges of the lower plates will rest upon the sleeve 7 of the adjoining plates, as shown in Fig. 2. These lower contacting plates thus coperate to form a screening surface extending under the drum 1 and adapted to receive small gravel and sand from the drum. The sand will pass through said plates while the gravel will be discharged as tailings.

As each plate 6 passes a vertical position during the rotation of the screen, it will fall inwardly through approximately 45 and its free longitudinal edge will strike violently upon the drum l, dislodging any material which may be clogging the openings in the plate. The plate will remain in contact with the drum until it descends to a substantially vertical position whereupon it will again come into contact with the sleeve of the next adjoining plate and be supported thereby as it passes under the drum. Thus it will be seen that a simple and eiicient self cleaning rotary screen is provided.

What is claimed is Y l. A rotary inclined screen including a foraminous drum mounted for rotation, and a series of hingedly mounted screen plates extending around and revoluble with the drum, each plate having its advancing edge supported by the next adjoining plate in advance thereof, said plates being tiltable successively into contact with the drum when moved upwardly past their vertical positions, to dislodge the material from the openings in the plate and in the drum.

2. A rotary inclined* screen including a drum mounted for rotation, a series of rods spaced from and revoluble with the drum, screen plates having sleeves engaging the rods, the advancing edge of each plate being supported, during the movement of the plate under the drum, by the sleeve of the next adjoining plate in advance thereof, said plates being tiltable successively inwardly against the drum to dislodge material accumulated within openings in the plates and the drum, and to an inverted osition when moved past a vertical positlon during the rotation of the screen.

3. A rotary inclined screen including a rotation and extending around the drum, tion to dislodge material accumulated With- 1o each plate being hingedly mounted and haw in openings in the plates and drum.

ing its advancing edge supported by the In testimony that I claim the foregoing next adjoining plate in advance thereof duras my own, I have hereto affixed my signaing the movement of the plate under-the ture in the presence of two Witnesses.

drum, said plates being successively tilted FITCH H. BEACH. inwardly through approximately 45 and Witnesses:

into violent contact with the drum when M. A. B. ALSENER,

moved upwardly past their vertical posi- ETHEL SHOTWELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

